Poor Service from Vox Telecoms

I was told that my Fibre line with Vox would take place within 7 days which has now passed & nobody has an update on the status of the connection or why there is a delay. I'm calling their support team everyday and get told the same thing ie: "We will get someone to call you back" but nobody every does. Is there any person / manager that's accountable who takes charge of matters at Vox?